I am usually only used to co-op in these types of games, but after playing WOWS (World of Warships) i found out there was no co-op mode at all in WOT (World of Tanks). I would love to have co-op in WOT just like the same as WOWS. Players vs bots is usually my type when i play games. Just a suggestion to the game that you could add if you have the time.

The only way this would be able to be implemented past tier 3 is for it to give next to no credits/xp, otherwise it would just be abused for good stats and tech tree progression.

There is already the ability to play against bots, but only low tier and after the first 10 games you stop receiving xp, just get used to playing against other people, learning the basics doesn't take too long. The way I see it is you are ready to move up to the next tier when you can comfortably average your own health in damage/assist, that way you know you have pulled your own weight.